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Derivative And Credit-Related Financial Instruments (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Credit Derivatives [Line Items] |  |  |  |  |  |
Cash received as collateral for derivative assets | $ 86 |  |  |  | $ 86 |
Fair value of securities pledged as collateral for derivative assets | 84 |  |  |  | 84 |
Cash posted as collateral for derivative liabilities | 5 |  |  |  | 5 |
Net cash flow hedge income (loss) included in interest and fees on loans | (174) |  |  | $ (150) | (344) | $ (269)
De-designated Interest swaps |  |  |  |  | 7,000 |
Total Impact to risk management hedging income |  |  |  |  | (130) |
Impact to risk management hedging income |  | $ (39) | $ (91) |  |  |
Amoritized Off Market Element | 49 | 41 |  |  |  |
Net Benefit of Swaps | (3) | 3 |  |  |  |
Gain/Loss on cash flow hedge de-designation | 2 | 27 |  |  |  |
Price alignment income | 17 |  |  | 7 | 30 | 15
Net gain (loss) on open foreign currency positions |  |  |  | (1) |  | (1)
Allowance for credit losses on lending-related commitments | 31 |  | 40 |  | 31 |
Allowance for credit losses on lending-related commitments, amount related to unused commitments to extend credit | 30 |  | 38 |  | 30 |
Risk participation agreements covering standby and commercial letters of credit | 75 |  | 85 |  | 75 |
Standby and commercial letters of credit | 3,800 |  | 3,600 |  | 3,800 |
Carrying value of standby and commercial letters of credit included in accrued expenses and other liabilities | 33 |  | 34 |  | 33 |
Deferred fees on standby and commercial letters of credit included in accrued expenses and other liabilities | 32 |  | 32 |  | 32 |
Allowance for credit losses on lending-related commitments, amount related to standby and commercial letters of credit | 1 |  | 2 |  | 1 |
Notional amount of derivative credit risk participation agreements | 1,000 |  |  |  | $ 1,000 |
Maximum estimated exposure to credit risk participation agreements assuming 100% default |  |  | 2 |  |  |
Weighted average remaining maturity of credit risk participation agreements (in years) |  |  |  |  | 4 years 1 month 6 days |
Amortized - probable cashflows in OCI | (52) | $ (52) |  |  |  |
Noninterest income | 291 |  |  | $ 303 | $ 527 | $ 585
Recurring |  |  |  |  |  |
Credit Derivatives [Line Items] |  |  |  |  |  |
Fair value of derivative liability | 1,176 |  | 1,322 |  | 1,176 |
Level 3 | Recurring |  |  |  |  |  |
Credit Derivatives [Line Items] |  |  |  |  |  |
Fair value of derivative liability | 6 |  | 12 |  | 6 |
Level 3 | Recurring | Other financial derivative liabilities |  |  |  |  |  |
Credit Derivatives [Line Items] |  |  |  |  |  |
Fair value of derivative liability | $ 6 |  | $ 12 |  | $ 6 |

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